/*
 * android-spinnerwheel
 * https://github.com/ai212983/android-spinnerwheel
 *
 * based on
 *
 * Android Wheel Control.
 * https://code.google.com/p/android-wheel/
 *
 * Copyright 2011 Yuri Kanivets
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.ssf.runningerrands.views.spinnerwheel;

    /**
     * Range for visible items.
     */
    public class ItemsRange {
        // First item number
        private int first;
        
        // Items count
        private int count;
    
        /**
         * Default constructor. Creates an empty range
         */
        public ItemsRange() {
            this(0, 0);
        }
        
        /**
         * Constructor
         * @param first the number of first item
         * @param count the count of items
         */
        public ItemsRange(int first, int count) {
            this.first = first;
            this.count = count;
        }
        
        /**
         * Gets number of  first item
         * @return the number of the first item
         */
        public int getFirst() {
            return first;
        }
        
        /**
         * Gets number of last item
         * @return the number of last item
         */
        public int getLast() {
            return getFirst() + getCount() - 1;
        }
        
        /**
         * Get items count
         * @return the count of items
         */
        public int getCount() {
            return count;
        }
        
        /**
         * Tests whether item is contained by range
         * @param index the item number
         * @return true if item is contained
         */
        public boolean contains(int index) {
            return index >= getFirst() && index <= getLast();
        }
}